For the record, I think ad-supported software is fine. It turns out advertising is important. You need a wide range of people to find your app.
The problem with online ads is that the whole ecosystem frequently gets out of control due to greed and how easy it is to propagate. Like some of us remember the 90s and early 00s when the web was literally unusable due to popup ads.
https://dotnet.social/@poppastring/112288732820597479